Concrete-mixer.



W. PPILE.

CONCRETE MIXER.

APPLICATION FILED MAR. 1a, 1913.

Patented July 14, 1914.

2 SHEETSSHEET 1 W. PFILE.

CONCRETE MIXER.

APPLIOATION FILED MAR. 18, 1913.

1,103,685, Patented July 14,1914.

2 SHEETSBHEET 2.

1 1E NORRIS FETIRS cm, WASHINGYON, n. c.

WILLIAM PFILE, OF FREEPOR'I, ILLINOIS.

CONCRETE-MIXER.

Specification of Letters Patent.

Patented July 14, 1914.

Application filed March 18, 1913. Serial No. 755,152.

To all whom it may concern:

Be it known that I, IL-LIAM PFILE, a citizen of the United States,residing at Freeport, in the county of Stephenson and State of Illinois,have invented certain new and useful Improvements in Concrete-Mixers, ofwhich the following is a specification.

This invention relates to concrete mixing machines of a type in which arevolving cylinder is employed to mixthe concrete;

The object of the invention is to construct a mixer of this type inwhich the mixing cylinder shall be suspended and carried by chains thatform driving means for rotating the cylinder.

In the accompanying drawings: Figure 1 illustrates my improved concretemixer mounted on a carrying truck, the View showing the discharge end ofthe mixer. Fig. 9 is a longitudinal section through the cylinder astaken on the line 22 of Fig. 1. Fig. 3 is a view of the mixer from thefront end of the truck.

A concrete mixer of my improved construction may be positionedstationary or upon amovable truck as illustrated. The truck frame 3 issupported by the rear carrying-wheels 4 and front dirigible wheels 5.The concrete mixer is mounted on the truck 3 to the forward end thereofto leave room for a suitable form of engine to be mounted on the rear ofthe truck to rotate the mixing cylinder.

Two standards 6 of angle iron are bolted to opposite sides of the frame3, forming arch supporting means which carry the cylindrical mixer.Journal bearing brackets 7 are bolted to the top of standards (3 andcarry the drive-shaft 8. Sprocket-wheels 9 are fixedly mounted on shaft8 adjacent the end bearings 7.

The cylindrical mixer 10 is formed of metal plate and is conical inshape. At the feed end of the mixer is an angle mouth piece 11 whosesides converge inward to the opening therein. Angle iron ribs 12 securedto the inner side of the mixer form strengthening means and also assistin agitating the concrete. A spiral plate 13 having an opening at itscenter is carried transversely in the mixer and assists in agitating thecontents being mixed. A horizontally disposed water pipe 21 supported bybracket 22 bolted to standards 6 has a plurality of spaced openingsthrough which water is fed to the contents after the same have been drymixed at the entrance side of p1ate-13. Sprocket-wheels 14 are fixedlycarried at each end of the mixer in alinement with the sprocket--wheels9, both of sprocket-wheels 14 being of the same diameter. Endless chains15 connect the sprocket-wheels, suspending the mixer with its axishorizontal, these chains forming the sole support-ing means for themixer. Channel tracks 16 are mounted on the peripheral face of the mixerto the outer side of the sprocket-wheels and form guides for rollers 17which are carried by the adjustable brackets 18 pivoted from pins 19 onthe standards 6, these rollers guiding and holding the mixer from anyswinging movement from their suspension support. A pulley wheel 20 isfixed on shaft 8 and is adapted to be driven by an engine carried at therear end of the truck.

In operation, the cylinder is revolved slowly through the over-headdrive, and gravel, sand and cement are fed to the cylinder through thenarrow end thereof. The mouth plate 11 because of its conical shape,holds the contents being mixed within the cylinder, preventing leakageat the feed end. The contents are thoroughly dry mixed in thecompartment to the entrance side of the spiral plate, and as thecylinder revolves, that which is thoroughly mixed dry passes through theopening in the center of said plate and is mixed with water fed frompipe 21, the contents moving because of the downward slope of the bottomof the cylinder, to the open end thereof, from which they are dischargedin the form of concrete.

It will be seen that by suspending the mixing cylinder by chains thatserve as means for rotating the cylinder, that a very simple and easyrunning mixer is obtained. The few working parts involved in such aconstruction makes the mixer inexpensive in its manufacture and sale,while not depreciating in the least from the eliiciency of the resultingwork.

I claim as my invention.

1. A concrete mixer comprising a rotatable conical cylinder having theopening of its smallerend reduced by a flange extending inwardly fromthe cylinder casing, a spiral plate located in the cylinder dividingsame into an intake and discharge compartment, said plate adapted toretain the bulk of in rear cuts in the entrance compartment [ur'iiigcertain part of operation, baffle plates ex tending inwardly from. thecasing;

" in both compartments, the cylinder being mounted with its axishorizontal so that said ingredients Will hethoronghly" mixedbeforepassing-said spiral plate andv means for supplying Water in thedischarge compartment from central and spaced points therein; a a i p 2.A concrete mlxer comprising a. rota-t able cylinder having an entranceand discharge end, -the opening of the entrance end being; reduced by aflange extending inwardly from the cylinder easing, a spiral platelocated in the cylinder dividing same into; an intake and dischargecompartment,

v.said plate adapted to retain the bulk of ingredients in the entrancecompartment duringa certain portion of operation, baffle platesextending inwardly from the'cy-linder casing in both compartments, thecylinderbeing mounted With 1ts lower cylinder v wall inclined with itsentrance end the high- I est to" allow said retained ingredients to bethoroughly dry mixed before passing said spiral plate, and means forsupplying w'a-f WILLIAM PFILE.

l vitnessesr HAROLD D.-JAMEs,

C. G. NILEs,

Copies of tfiis patnt may be obtained" for five cents each, byaddressing the commissioner of Patents";

- i I 1 I Wahingtbn', D10. i

